. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. about oue-third of an inch FiR. 8. THE STRIPED CUCULIBER BEETLE (DiabroHca vittata.) Probably during no season for many years past have the growers of the squash, melon and cucumber in the western part of the Province been so pestered with destructive insects as during the past year. The little striped cucumber beetle, fig. 7, seems to have Fig. 7. been everywhere common and in many localities most destructive. This beetle feeds on the tender leaves of the young plants and damages the b
. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. about oue-third of an inch FiR. 8. THE STRIPED CUCULIBER BEETLE (DiabroHca vittata.) Probably during no season for many years past have the growers of the squash, melon and cucumber in the western part of the Province been so pestered with destructive insects as during the past year. The little striped cucumber beetle, fig. 7, seems to have Fig. 7. been everywhere common and in many localities most destructive. This beetle feeds on the tender leaves of the young plants and damages the buds and young shoots of later growth, while its larva attacks the stems of the vines boring into them, and thus destroying the plants. It makes its appearance very early in the season as soon as the young plants appear, and sometimes it even penetrates the earth in search of the growing seeds. It is about a quarter of an inch long, of a bright yellow colour, with a black head and stripes of black on the wing covers, the underside of the abdomen and feet also are black. A few days later the female deposits her eggs near the roots of the vines which, in due course, hatch into tiny whitish worms, which burrow in the stems until full grown, when they are long and as thick as a good sized pin. Fig. 8 shows this larva magnified—1 showing the back, 2 a side view, the shorter lines to the left indicate the natural size. They attain "^matu- rity in about a month when they leave the plant and descend into the earth and form little cavities where they transform to chrysalids. They are less than a fifth of an inch in length, of a whitish colour; the extremity of the abdomen ending in two rather long spines. In fig. 9 is shown a T \%1 T IVJ front and back view of the pupa en- I VTm ijj ^ ^' larged. In the course of a fortnight the I K3/ dfib perfect beetle matures when it escapes «i» * f 1 ll w ^^^P, ^l^^^^ir _ from a state of inactivity to continue its work of destruction. There a
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
